Fundamental Study on Building Arrangement to Maximize Thermal Acceptability of Outdoors at Different Latitudes Part 1: The Characteristics of Wind Velocity Distributions in Different Building Arrangements in Guangzhou and Sendai

摘要

With global warming and UHI (urban heat island) effects, the highest air temperature in summer season sets another new record year by year and extreme hot days last longer and longer. For that reason, more and more people are attacked by heatstroke and some of them even die from it. In order to cool down urban area and therefore reduce heat-related illnesses, this study attempts to maximize thermal acceptability of outdoors by optimizing building arrangement from the viewpoints of urban ventilation and sun-shading. Moreover, the intensity of solar radiation at ground level varies with latitude, so do the effects of sunshading. This indicates that the optimal building arrangement changes with latitude due to the different effects of urban ventilation and sunshading. To understand how the optimal building arrangement changes with latitude, Guangzhou (113°33'E, 23°17'N), China and Sendai (140°52'E, 38°16'N), Japan (shown in Fig. 1) are selected.